Page:Synopsis of the Exinct Batrachia and Reptilia of North America. Part 1..pdf/36

 32 yin EXTINCT BATRACHIA, REPTILIA Fig. 5. 'e ot "v• • • - • •n:-. -▪ -- • •■•• gigs§ tete • .*.g, 0.4r. - 0 IP. • • cr • •. • ••• • • -rt.••4• • ••••„.. %SP" • .•• ch •• •••• t•-•• S:'-:-. 9u";....-:,.. .'-1:-.. 41...--;1114-12eirc3.2 •6*oz.- I • • O ft:, . 'Ili 4.1.:": ;4.: ; 6.1:•.:•\ ::::.* .at. x 1 • 41 " • -. . Z.L.• ..../. :t. . I.. Si ti re : ,:i.: HEM a: in v. i ago `0.". - ' -- - - . ... y. c 0 ezt. • • • .,.- se." •" se -•* -- -. . .•- ---•,.; IA, 09... ... .?.... Fig. 6. • ECI ST Or S INTER NI EDIUS. Limbs ambulatory, no third trochanter. Sacrum of two vertebrae. No procoracoid of clavicle. Ribs mostly double-headed. External nostrils anterior. Pubes longitudinal, not entering acetabulum ; free distally. Zygapophyses only ; chevron bones Limbs ambulatory; a third trochanter on femur. Sacrum of two or three vertebrae ; acetabulum entire ; pubes united. Ribs double-headed. External nostrils posterior. Zygapophyses only and chevron bones. Limbs ambulatory or prehensile. Ilium horizontal, supporting a long sacrum of five or six vertebrae, the anterior derived from the lumbar series. The acetabulum thrown forwards, and not complete, but perforate. CROCODILIA. THECODONTIL
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